We provide SuGAr PWV data in three different file types here.

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##For .nc files:

The variable 'pwv' is the precipitable water vapor (with the unit of mm) over 45 stations during 2008-2013, every 3 hour.
The variable 'landmask' is the surface category, 1 represents ocean(island), 2 means coast, 3 means land.
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## For .mat file:

The file essentially contains one cell array, where the first entrance is the name of the station, the second entrance is an array with the coordinates of the station, and the third entrance is a larger array containing the data. The latter array has 8 columns which contain, respectively, year, time of year, month, day, hour, pressure (hPa), temperature (ºC), and PWV (mm).

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##For .npy files:

The 'GPS_3h_45stations.npy' is an PWV array whose shape is (17536, 45),17356 is the length of time series = (365 days *6 +2 days(2008,2012))*8(3hourly), 45 represents 45 GPS stations. 

In the 'GPS_name_index_lat_lon.npy', there are 45 station's name, surface category, latitude, longitude. For the surface category, 1 represents ocean(island), 2 means coast, 3 means land.

